html,body{
    height: 100%;
    overflow: scroll;
    background-color:#f9f9f9;
}
.header{
    position: relative;
    z-index: 10;
    width:7.5rem;
    height:0.8rem;
    padding-top:0.4rem;
    background:#000;
    color:#fff;
}

.header .iconfont{
    display: inline-block;
    width:0.4rem;
    height:0.4rem;
    padding:0.1rem;
    text-align: center;
}

.content{
    position: absolute;
    top:0;
    bottom: 1.2rem;
    width: 7.5rem;
    height:100%;
    overflow: scroll;
}
.content ul{
    position: absolute;
    padding-top:1.2rem;
    padding-bottom:1.7rem;
    width: 7.5rem;
}
.content li{
    position: relative;
    width:6.5rem;
    margin:0 auto;
    padding-top:0.7rem;
    font-size: 0;
    
}
.content a {
    display: block;
    color:#fff;
    
}
.content a img{
    width:100%;
    height:3.6rem;
}
.content a .title{
    position: absolute;
    top:3rem;
    left:50%;
    transform: translateX(-50%);
    width:6.2rem;
    height:0.9rem;
    line-height: 0.9rem;
    text-align: center;
    background-color:rgba(0,0,0,.3);
    font-size:0.28rem;
}
.content a .description{
    padding:0.6rem 0.4rem;
    font-size:0.26rem;
    color:#333;
    background-color: #fff;
}
.footer{
    position: fixed;
    width:7.5rem;
    height:1rem;
    display:flex;
    -webkit-display:flex;
    justify-content: space-around;
    line-height: 1rem;
    text-align: center;
    bottom: 0;
    left:0;
    font-size:0.32rem;
    background-color: #fff;
    
}
.footer>li{
    position: relative;
    flex:1;
    border-right:1px solid #999;
    overflow: hidden;
    z-index: 12;
}
.footer>li ul{
    width:100%;
    height:3.52rem;
    position: absolute;
    z-index: 11;
    top:1rem;
    left:0;
    transition:all 0.5s;
    background-color: #fff;
}
.footer>li ul.showSub{
    top:-3.52rem;
}
